is located on the eastern flank. The volcano has a volume of about and covers a surface area of about . With a height of , Incahuasi is the 12th-highest mountain in South America and one of the world's highest volcanoes. Incahuasi has two craters, a summit crater and an arcuate crater on the eastern slope that contains a lava dome. The summit crater has dimensions of and is embedded within a summit plateau. Subsidiary vents conversely are associated with fissure vents. The edifice appears to consist of two overlapping volcanoes. The western and southwestern slopes of Incahuasi are dotted with lava domes, which are more subdued than on other volcanoes in the region. Lava flows less than wide and long extend down the volcano. They reach the Las Coladas salar east of Incahuasi. Two coulees extend north and east of the main crater. northeast of Incahuasi, four pyroclastic cones can be found. They have covered with lava but they are probably an independent volcanic system, similar to other regional mafic volcanoes. On Incahuasi's eastern flank lies a major lava dome and a field of lava flows. Incahuasi rises over a surface with elevations of . The volcano is surrounded by a field of small volcanoes that is known as the Incahuasi field; it contains 19 small volcanoes with a total rock volume of , which were active during the last 1 million years. Composition Like many Andean volcanoes, Incahuasi has erupted andesite containing hornblende and pyroxene, but also trachyandesite and trachydacite. Lava flows on the main stratovolcano are dacitic. The four cones northeast of the principal volcano have erupted basaltic andesite. Likewise, parasitic cones have erupted magnesium-rich basaltic andesite. Minerals contained in these rocks include clinopyroxene and olivine. The occurrence of such basic magmas in a volcanic setting dominated by dacites appears to be a consequence of local tectonics, which involve the extension of the crust compared to the compressional regime farther west. Originating in the mantle, the magmas quickly ascended in faults and were contaminated by crustal material. The mantle itself had been modified before by crustal material added by delamination of the lower crust and subduction erosion. Climate Incahuasi does not have glaciers, but it does have at least temporary snowpack. Even the crater does not support the development of glaciers. Average precipitation at Incahuasi is about . The volcano lies south of the so-called "Arid Diagonal",